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Premature failure analysis of forged cold back-up roll in a continuous tandem mill

In this paper, premature failure of a forged back-up roll from a continuous tandem mill was investigated. Microstructural evolutions of the spalled specimen and surface of the roll were characterized by optical microscopy, X-ray diffraction, scanning electron microscopy and ferritscopy, while hardne...

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Main Authors:	Bakhsheshi Rad, Hamid Reza, Monshi, Ahmad, Idris, Mohd. Hasbullah, Abdul Kadir, Mohammed Rafiq, Jafari, Hassan
Format:	Article
Published:	Elsevier Ltd. 2011
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://eprints.utm.my/id/eprint/29371/ http://dx.doi.org/10.1016/j.matdes.2011.03.078
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id	my.utm.29371
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spelling	my.utm.293712019-03-25T08:07:08Z http://eprints.utm.my/id/eprint/29371/ Premature failure analysis of forged cold back-up roll in a continuous tandem mill Bakhsheshi Rad, Hamid Reza Monshi, Ahmad Idris, Mohd. Hasbullah Abdul Kadir, Mohammed Rafiq Jafari, Hassan TJ Mechanical engineering and machinery In this paper, premature failure of a forged back-up roll from a continuous tandem mill was investigated. Microstructural evolutions of the spalled specimen and surface of the roll were characterized by optical microscopy, X-ray diffraction, scanning electron microscopy and ferritscopy, while hardness value of the specimen was measured by Vickers hardness testing. The results revealed that the presence of pore and MnS inclusion with spherical and oval morphologies were the main contributing factors responsible for the poor life of the back-up roll. In addition, metal pick up and subsequently strip welding on the surface of the work roll were found as the major causes of failure in work roll which led to spalling occurrence in the back-up roll. Furthermore, relatively high percentage of retained austenite, say 9%, in outer surface of the back-up roll contributed spalling due to conversion of this meta-stable phase to martensite and creation of volume expansion on the outer surface through work hardening during mill campaign. Elsevier Ltd. 2011-09 Article PeerReviewed Bakhsheshi Rad, Hamid Reza and Monshi, Ahmad and Idris, Mohd. Hasbullah and Abdul Kadir, Mohammed Rafiq and Jafari, Hassan (2011) Premature failure analysis of forged cold back-up roll in a continuous tandem mill. Materials and Design, 32 (8-9). pp. 4376-4384. ISSN 0264-1275 http://dx.doi.org/10.1016/j.matdes.2011.03.078 DOI:10.1016/j.matdes.2011.03.078
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Bakhsheshi Rad, Hamid Reza Monshi, Ahmad Idris, Mohd. Hasbullah Abdul Kadir, Mohammed Rafiq Jafari, Hassan Premature failure analysis of forged cold back-up roll in a continuous tandem mill
description	In this paper, premature failure of a forged back-up roll from a continuous tandem mill was investigated. Microstructural evolutions of the spalled specimen and surface of the roll were characterized by optical microscopy, X-ray diffraction, scanning electron microscopy and ferritscopy, while hardness value of the specimen was measured by Vickers hardness testing. The results revealed that the presence of pore and MnS inclusion with spherical and oval morphologies were the main contributing factors responsible for the poor life of the back-up roll. In addition, metal pick up and subsequently strip welding on the surface of the work roll were found as the major causes of failure in work roll which led to spalling occurrence in the back-up roll. Furthermore, relatively high percentage of retained austenite, say 9%, in outer surface of the back-up roll contributed spalling due to conversion of this meta-stable phase to martensite and creation of volume expansion on the outer surface through work hardening during mill campaign.
format	Article
author	Bakhsheshi Rad, Hamid Reza Monshi, Ahmad Idris, Mohd. Hasbullah Abdul Kadir, Mohammed Rafiq Jafari, Hassan
author_facet	Bakhsheshi Rad, Hamid Reza Monshi, Ahmad Idris, Mohd. Hasbullah Abdul Kadir, Mohammed Rafiq Jafari, Hassan
author_sort	Bakhsheshi Rad, Hamid Reza
title	Premature failure analysis of forged cold back-up roll in a continuous tandem mill
title_short	Premature failure analysis of forged cold back-up roll in a continuous tandem mill
title_full	Premature failure analysis of forged cold back-up roll in a continuous tandem mill
title_fullStr	Premature failure analysis of forged cold back-up roll in a continuous tandem mill
title_full_unstemmed	Premature failure analysis of forged cold back-up roll in a continuous tandem mill
title_sort	premature failure analysis of forged cold back-up roll in a continuous tandem mill
publisher	Elsevier Ltd.
publishDate	2011
url	http://eprints.utm.my/id/eprint/29371/ http://dx.doi.org/10.1016/j.matdes.2011.03.078
_version_	1643648285347414016
score	13.211869

Premature failure analysis of forged cold back-up roll in a continuous tandem mill

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